Sibling for Lysander

I don't actually have any children at the moment. But I do love the name Lysander, and I couldn't picture naming my first son any other name. What I was wondering was if anyone had suggestions for a sibling name that goes well with Lysander. I thought of Aurora, and Astoria. I love Aurora, but I guess I don't think it flows too well. And nobody I know can even pronounce Astoria. For some reason I can't think of any other boy names either. For some reason Klaus comes to mind, but my boyfriend can't stand that name. Could anyone possibly help?

Aurora goes really well with Lysander! You don't need to worry about the flow. Lysander is one of my guilty pleasure names, I really like it I would name Lysander's brother Thaddeus. I love the way they sound together

*Just saw that the person before also suggested Thaddeus. Sorry for repeating!